Clamping board is the transom of the bracket. The bracket will sit 3" above the keel of the boat. I was planning on the top of the clamping board to be right at 34" off the keel of the boat. I do plan on adding stringers, I was planning on two, full height and about 3.5" wide, built on a foam core. The only part of the bracket tub that is cored is the clamping board. It is two pieces of 3/4" and one piece of 1/2" marine ply hot coated with neat epoxy and then laminated with epoxy, cabisol, cotton flocking mix spread with a 3/16 notched trowel and pulled together with lots of screws, later removed. The rest of the tub is about 3/8 thick mainly 1700 thicker at the corners. The front face is thinner except the perimeter 5-6" where the bolts will go thru. That is about 7/16"
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